Question

Suma a cinci nr impare consecutive este 75 .sa se afle numerele

Answer 1

a+a+1+a+2+a+3+a+4=75
5a+10=75
5a=75-10
5a=65
a=65:5
a=13

Answer 2

|____| 1 nr
          1 1 
|____|_|_| 2nr
          1 1 1 1
|____|_|_|_|_|3nr
         1 1 1 1 1 1
|____|_|_|_|_|_|_|4nr
         1 1 1 1 1 1 1 1
|____|_|_|_|_|_|_|_|_| 5nr

75-1x20=75-20=55(cele 5 segmente egale)
55:5=11(1nr)
11+1+1=13(2nr)
11+1+1+1+1=15(3nr)
11+1+1+1+1+1+1=17(4nr)
11+1+1+1+1+1+1+1+1=19(5nr)
V:11+13+15+17+19=75

Raspuns: 11, 13, 15, 17, 19